Researchers often presume that it is better to use administrative data from grades 4 and 5 than data from grades 6 through 8 for conducting research on teacher effectiveness that uses value-added models because (1) elementary school teachers teach all subjects to their students in self-contained classrooms and (2) classrooms are more homogenous at…

Exemplary Middle Grades Research: Evidence-Based Studies Linking Theory to Practice features research published throughout 2009 in MGRJ that has been identified by the Information Age Publishing's review board as the most useful in terms of assisting educators with making practical applications from evidence-based studies to classroom and school…